Electrically-heated sadiron



I. F. LAM B.

I ELECTRICALLY HEATED SADIRONP APPLICATION FILED JULY 23. (92:.

mmu, ratentedNo zs, 922;.

- Patented Nov. 28, 1922.

, citizen of the embodiment which is desired base plate a of the iron is JOSEPH F. LAMB, 01' NEW BRITAIN, CONNECTICUT, ASSIGNOR '10 LANDERS, FRARY &

CLARK, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

ELECTRICALLY-HEATED SAIDIRON.

a pnomon nlea'rui as, 1921.. Serial No, mama- To aZZ whom it may concern Be it known that I, JOSEPH F. LAMB, a United States, and'a resident of New Britain, county of Hartford, State of Connecticut,- and useful Improvements in Electrically- Heated Sadirons, of which the following is a specification.

The object of the present invention is to produce an electrically heated device, such as a sad iron, having various features of novelty and advantage.

More particularly the invention has as its aim to provide a device of this sort wherein the heat generated is so distributed to the mass of metal .to' berheated as to effect the greatest advantage and efliciency, In the of the invention here shown for illustrative purposes, the arrangement is such that that ortion'of the sole or base plate of-the, sad iron, for instance the toe to do the most work' in quickly, heated and repressing, is more tained at a hi her temperature than other parts of the so e plate- In e accompanying drawin s: a

Fig. 1 is a vertical sectiona view taken longitudinally through my improved sad ron.

Fig. 2 is a top plan view of the sole plate witih the heating element mounted therein, an x Fig. 3 is a detail view of the terminals 100 'ngin the direction of the arrow 3 of fieferring to the drawings in detail, a denotes a sole plate, I) a heating element carried thereby, a a weight, d a cover, 12 a handle and f terminal plugs connected to the heat ng element b and protected by the guard 1 ,As 0 early shown in Figfl'; the sole or O creasing thickness from its toe to its heel, and arising from the edge of this plate is a marginal rib 11. Within the chamber A formed by this rib and preferably made in- .-tegi*ally with the base plate a, are spaced projections 13 against which are positioned heat conducting electrical insulators 1 sup- Y porting/upon their external surfaces the heating element 6 coiled resistance wire. Preferably the inner have invented certain new gradually in in the form of a bare .edge of the marginal rib 11 is scalloped as I indicated at 16 to bring it more closely adgacent to the winding of the resistor. A

ayer 17 of insulating material is interposed between the rib-11 and the weight 0 to pre vent the heat from flowing to thelatter,

It will be seen that with the arrangee0 ment thus .far described, when the current is turned onto the resistance wire 6 the heat,

in part, is radiated directly to the body portion of the base plate and to the marginal rib 11 and, in part, is conducted to the sole plate through the bushings 14 and the projections 13, Since the sole plate is of reduced thickness at its toe portion, this portionof the plate quickly brought. to the desired temperature.

will be first and very his toe port-ion of the iron will be main i tained at a uniform temperature since the heat is supplied thereto as-quickly as it is thework. Thus the drawn therefrom by heat is properly distributed to the sole plate and the portions of this platewill be maintained at such relative temperatures as to effect the greatest efliciency and advantage. a The terminals f are in the form of posts or pins having their inner ends of enlarged diameter and threaded as -'at 20. These posts extend through openings 21 in the cover d and have secured to their inner ends. by means of nuts 22, the ends of the resistance wire. The posts are secured in place by nuts 24. secured onto the projecting threaded portions 20 of the posts and against the cover. The mica sheets 25 prevent short circuiting, It will beseen that since the nuts 24 are where they can be easil gotten at, the posts may be very readily an quickly connected and disconnected from the cover.

In assembling the parts, the ends of the resistance Wire are connected to the terminals, these terminals are then passed from the inside of the. casing through the openover the outer ends of the terminals and screwed home against the cover. When it is desired to take off the cover this may be done without disconnecting the terminals from the resistance wire.

It is of course obvious that my invention is susceptible of various modifications and 1ngs21 and. then the nuts 24 are slipped.

of the following claims, it being understood that the present disclosure of my invention is by way of illustration only and it is not to be taken as restrictive of my conception.

' I claim as my invention 1. In a device of the character a sole plate generally wedge shape in vertical longitudinal section and being of less thickness at its toe than its heel,'and a heating element associated therewith.

'2. In a device of the character described, a sole -plate of varying thickness, spaced projections on the upper surface thereof, a bushing associated with each projection, and a resistance wire supported by-said bushings.

3. In a device of the character described, a sole plate varying down in thickness towards its toe and having an upstanding marginal rib and an electrical heating element supported on the upper face of said sole plate in heat conducting relation thereto described,

and also in heat radiating relation with said sole plate and rib.

l. In a device of the character described, a sole plate gradually decreasing in thickness towards its toe, andelectrical means for heating said sole plate.

5. In a device of the character described, a sole plate gradually decreasing in diameter towards its toe, and a heating element in heat conducting and in heat radiating relation to said plate.

6. In a device of the character described, a sole plate, a cover therefor having openings, a heating element within said cover, terminal posts having enlarged threaded ends extending through the openings in said cover, means for connecting said heating element to the inner 'ends of said terminals, and nuts screwed onto the projecting threaded portions of said terminals against said cover.

JOSEPH F. LAMB. 

